And speaking at the show’s launch at London’s BBC Broadcasting House, Lee Ryan, from boy band Blue, said being on such a huge programme was “daunting” and said he was “a bit worried”.

“It is such a big show and you know there is going to be a lot of media attention,” he said, adding: “I’m quite competitive as well so I will want to improve.”

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TV stylist Susannah Constantine and Blue singer Lee Ryan

TV fashion stylist Susannah Constantine said she had some demands about the costumes she would be willing to wear during the competition, such as keeping her arms covered, adding: “I’m very happy to be kind of matronly a little bit, but colourful.”

Other celebrities taking part include former Pussycat Dolls singer Ashley Roberts, who has presented on Ant and Dec’s Saturday Night Takeaway and was a guest judge on BBC talent show Let It Shine.

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Dr Ranj Singh and Ashley Roberts at the launch outside the BBC on Monday

TV medic Dr Ranj Singh is also on the line-up, as is double world champion paratriathlete and silver Paralympic medallist Lauren Steadman.

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Six times European champion Lauren Steadman and actor Danny John-Jules